Answers

2016-07-15T07:07:10+08:00
F'(x)=f(x+h)-f(x)]\h: h limit 0: =x+h)^2-2(x+h)-(x^2-2x)]/h =x^2+2xh+h^2-2x-2h-x^2+2h]/h =2xh+h^2-2h]/h =h(2x+h-2)]/h.....cancel h; limit h 0 =2x-2...ans
0